Air Quality
Excellent
No health implications.
17
PM2.5
17
PM10
44
O3
0.4
CO
6
SO2
5
NO2
No health implications.
Advise
Everyone can continue their outdoor activities normally.
Air Quality
Today
16 Apr
41
Excellent
Wed
17 Apr
41
Excellent
Thu
18 Apr
45
Excellent
Fri
19 Apr
52
Good
Sat
20 Apr
38
Excellent
Sun
21 Apr
37
Excellent
Mon
22 Apr
35
Excellent
Air quality in the last 12 months (Hong Kong)
|
2024/02
|
26
|
24
|
23
|
23
|
26
|
23
|
18
|
13
|
17
|
62
|
51
|
34
|
46
|
39
|
34
|
36
|
28
|
34
|
26
|
19
|
21
|
22
|
37
|
35
|
28
|
45
|
37
|
43
|
49
|
||
|
2024/01
|
58
|
53
|
46
|
38
|
39
|
58
|
48
|
52
|
48
|
36
|
41
|
53
|
44
|
30
|
34
|
41
|
35
|
26
|
23
|
36
|
35
|
35
|
27
|
37
|
42
|
50
|
54
|
35
|
45
|
52
|
31
|
|
2023/12
|
50
|
51
|
49
|
57
|
49
|
42
|
27
|
35
|
42
|
34
|
19
|
39
|
32
|
28
|
23
|
21
|
34
|
47
|
37
|
29
|
30
|
53
|
49
|
43
|
43
|
49
|
51
|
55
|
36
|
51
|
64
|
|
2023/11
|
37
|
31
|
32
|
28
|
25
|
31
|
40
|
38
|
39
|
29
|
28
|
22
|
24
|
36
|
34
|
34
|
52
|
60
|
55
|
50
|
38
|
32
|
52
|
48
|
51
|
44
|
54
|
49
|
51
|
54
|
|
|
2023/10
|
26
|
34
|
36
|
47
|
30
|
32
|
19
|
22
|
17
|
18
|
26
|
27
|
26
|
35
|
43
|
46
|
42
|
42
|
33
|
29
|
23
|
32
|
40
|
32
|
30
|
27
|
22
|
31
|
37
|
42
|
39
|
|
2023/09
|
19
|
26
|
22
|
39
|
34
|
37
|
28
|
19
|
19
|
19
|
14
|
13
|
14
|
11
|
14
|
16
|
15
|
14
|
14
|
13
|
21
|
26
|
20
|
18
|
22
|
24
|
27
|
24
|
22
|
25
|
|
|
2023/08
|
17
|
23
|
21
|
19
|
25
|
33
|
29
|
27
|
26
|
25
|
23
|
19
|
25
|
30
|
30
|
33
|
38
|
26
|
26
|
24
|
20
|
18
|
21
|
15
|
17
|
19
|
17
|
17
|
21
|
28
|
24
|
|
2023/07
|
12
|
11
|
15
|
17
|
20
|
18
|
22
|
19
|
14
|
13
|
14
|
14
|
15
|
19
|
36
|
22
|
27
|
33
|
19
|
17
|
16
|
14
|
13
|
14
|
15
|
49
|
36
|
32
|
26
|
23
|
15
|
|
2023/06
|
37
|
34
|
23
|
17
|
19
|
17
|
18
|
14
|
18
|
15
|
22
|
20
|
21
|
23
|
23
|
19
|
13
|
15
|
18
|
19
|
18
|
17
|
17
|
16
|
18
|
13
|
14
|
15
|
16
|
17
|
|
|
2023/05
|
38
|
42
|
32
|
26
|
20
|
19
|
23
|
24
|
31
|
40
|
37
|
41
|
23
|
31
|
41
|
28
|
19
|
38
|
44
|
33
|
21
|
21
|
31
|
56
|
47
|
28
|
27
|
25
|
32
|
54
|
53
|
|
2023/04
|
30
|
27
|
31
|
35
|
28
|
24
|
24
|
40
|
50
|
35
|
36
|
29
|
47
|
61
|
50
|
46
|
36
|
29
|
29
|
28
|
31
|
38
|
53
|
46
|
33
|
23
|
34
|
35
|
32
|
34
|
|
|
2023/03
|
51
|
59
|
50
|
45
|
39
|
40
|
34
|
32
|
40
|
43
|
39
|
40
|
70
|
53
|
43
|
43
|
33
|
35
|
29
|
31
|
24
|
19
|
25
|
34
|
28
|
17
|
18
|
28
|
37
|
32
|
28
|
|
1
|
2
|
3
|
4
|
5
|
6
|
7
|
8
|
9
|
10
|
11
|
12
|
13
|
14
|
15
|
16
|
17
|
18
|
19
|
20
|
21
|
22
|
23
|
24
|
25
|
26
|
27
|
28
|
29
|
30
|
31
|
- Excellent
- Good
- Lightly
- Moderately
- Heavily
- Severely
Air quality source: CNEMC
*: primary pollution